WIP B&W portrait experiment

This is my B&W portrait experiment. I'm happy with the result so far. However, I'm not so sure on likeness. Is there anyway I can improve the likeness? I want to build up everything accurately before put some more detail on it. Or should I just proceed with detail painting? Your comments would be appreciated.

Thanks you all the comments here. @PaulB I think i've done what you've suggested. @KevinGE I just want to make it look like a person I'm painting. I want to take some commissions in the future if possible. I need to practice.

I like it a lot. By coincidence I'm doing a homage to Toulouse Lautrec in monochrome. He's a favourite of mine. I had the drawing completed ages ago but decided yesterday to just get stuck in. When I Left it yesterday I was happy enough, I might think differently when I go in this morning. Portraits are difficult. The wrong brush mark or dab will rob the work of the likeness especially around the mouth or eyes. If I may. Your portrait is great but the eye is drawn to the lower lip. It's too heavy

B&W portrait experiment day 3

When it gets down to the very end and I need to double check the features to zero in the likeness, I get my calipers and bump the lines around as necessary. A mm here or there can make all the difference. I think you did quite well.

Looks great, @Jack2015. If you don't want that very smooth look mentioned by@movealonghome you could rough up your brushwork a bit next time. But maybe the smoothness is what you were after, in which case, there's no problem.

I think you have done a good job on this. This was not an easy subject to paint, but I think you hit the values accurately. My only suggestion is to use a full size print to paint from, then you can measure the print with your calipers and compare it to what you are painting. I use calipers every step of the way on a portrait, one brush mark in the wrong place and you lose the likeness.Its very tedious, but it pays off.